Capable of charging 4 Li-ion batteries simultaneouslyMonitors and charges each of the 4 slots independentlyFeatures two charging modes (constant current and constant voltage)Automatically detects power level of batteries and selects the appropriate voltage and charging modeAutomatically stops upon charging completionOvercharging protectionReverse polarity prevention and short circuit preventionDesigned for optimal heat dissipationMade from durable PC materialInsured worldwide by Ping An Insurance